66785751402 has 16 divisors (see below), whose sum is σ = 133584744672. Its totient is φ = 22259710160.

The previous prime is 66785751371. The next prime is 66785751479. The reversal of 66785751402 is 20415758766.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 485568 + ... + 607739.

It is an arithmetic number, because the mean of its divisors is an integer number (8349046542).

Almost surely, 2^66785751402 is an apocalyptic number.

66785751402 is an abundant number, since it is smaller than the sum of its proper divisors (66798993270).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66785751402 is a wasteful number, since it uses less digits than its factorization.

66785751402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103493.

The product of its (nonzero) digits is 2822400, while the sum is 51.

The spelling of 66785751402 in words is "sixty-six billion, seven hundred eighty-five million, seven hundred fifty-one thousand, four hundred two".